Radio receiver



W 19360 J. STUSSEIR 2,037,,4

RADIO RECEIVER Filed Dec. 26, 1955 2 Sheets-Sheep 1 Fig. I.

Witness es In Vania/- Apmifi 21, 1936:, J STUSSER 2,037,946

RADIO RECEIVER (W i Filed Dec. 26, 1953 2 sheets-sheet 2 {Wit/125525 nkentar 0 mwm I 5M Patented Apr. 21 1936 UNITED STATES PATENT, OFFICE RADIO RECEIVER Joseph Stiisser, New Britain, Conn.

Application December 26, 1933, Serial No. 703,972

1 Claim. (Cl. 25014) This invention relates to new and useful imcient batteries or pen light cells to supply the provements in radio receiving, and has for its plate potential for vacuum tube 9. On top of principal object to provide a device which will casing I8 a small variable resistor I9 is mounted. make it possible to listen in on radio broadcast Cover 26 of casing I8 is removable to make the or police calls etc. in any place without having batteries accessible. One end of casing I8 carto hook up an antenna or ground connection or ries the earphone shell 2|. Regeneration control separate earphones, because by contact with the condenser 22 consists of metal rings which have hand the human body is utilized as an antenna. cutouts as shown in Figure 2. These cutouts At the same time this device is of such small can be brought in line and made to be opposite 10 physical dimensions, that it may be conveniently each other by turning the earphone cap 23, there- 10 carried around and also used as a flashlight. by increasing or decreasing capacity. One side The invention consists in certain novel fee.- of condenser 22 is mounted on the metal eartures of construction which can be readily unphone shell 2|. The other side of condenser derstood by reference to the description of the 22 is carried by the earphone cap 23, which is drawings and to the claim hereinafter given. made of insulating material and has an extension 15 Of the drawings: Figure 1 represents a secto cover the condenser unit 22. The cells 24 for tional View of the flash light radio receiver emfilament current supply of the vacuum tube 9 bodying the features of the present invention. are housed in a conventional flash light unit, of Figure 2 represents a development of the ring which the bottom cover 25 is secured to the plates of the regeneration control condenser. threaded condenser tuning tube 5. A contact 20 Figure 3 represents the schematic diagram of button 26 protrudes through the wall 21 of the the electrical circuit. flash light unit, and makes contact with metal In the views of the drawings I represents the ring 28 on which a hinge 29 is mounted. The hand contact coil utilizing the human body as cable 30 consists of a conductor which is covered antenna. 2 represents the insulating tube which with strong insulating material, and therefore 5 carries the hand contact coil. 3 is the tin foil can be used as a convenient handle for carrying serving as antenna condenser in combination the flash light radio unit. Hinge 3| is fastened with tubes 2 and 4. Condenser tuning tube 5 to housing tube 6 and a wire is connected on is threaded and screws into the threaded housthis end of cable to the filament terminal of 30 ing tube 6, on the outside of which is mounted tube socket II), thereby conducting the positive 30 the insulating tubes 2 and 4 and coil I. Tubes filament current to the vacuum tube 9. Cable 30 5 and 6 are made of conductive metal. Inside is the only wire connecting the lower adjustable of tube 5 is mounted one side of the tuning unit with the upper housing tube 6, which carcondenser unit, which consists of round metal rice the antenna coil unit, tuning coil unit, vactubes I. These tubes 1 are made to such sizes, uum tube 9, and one side of tuning condenser. 35 that when placed into each other, sufiicient space The negative filament current is conducted is left for the tubes 8 of the other side of the through tubes 5 and 5 by means of the contact tuning condenser to interpose and thereby formof the thread of these tubes. Switch 32 makes ing a condenser with the air space as dielectric. or breaks contact to supply current to the flash The number of tubes depends on the capacity light bulb 33. 4.0 which is required. The innermost of the tubes The mode of operation of the flash light radio I acts also as shield for the vacuum tube 9. will now be summarized. 'I'o tune in on radio A socket Ill is fixed to the top cover of housbroadcasting, the listener places one hand around ing tube 6 in such a manner that vacuum tube the contact coil I, with the other hand turns on 9 can be inserted or removed after condenser the filament current for vacuum tube 9 by means 45 tuning tube 5 has been unscrewed. Inside of of the variable resistor I9, and turns the flash housing tube 6 a coil form socket II is fastened, light casing either left or right hand, thereby which carries coil form I2 and also tubes 8 of screwing or unscrewing tuning tube 5, which the tuning condenser. The tuning coil I3 is in turn increases or decreases capacity of the wound on coil form I2. On top of socket Ill tuning condenser by increasing or decreasing 50 the grid leak I4 and grid condenser I5 are fasthe amount of interposition of condenser tubes 1 tened. The extension tube I6 has extension IT and 8. The signal finally is adjusted to the de of battery casing I8, inserted into it. By remo-vsired level by turning earphone cap 23 of the ing extension I I with casing I8, the wiring is regeneration control condenser 22. made accessible. Casing I 8 is filled with sufii-' Having described my invention, what I claim 55 as new, and desire to secure by Letters Patent, is:

A radio receiving device comprising an antenna system, said antenna system consisting of a. handcontact-coil with a fixed condenser in series, a tuning coil comprising a primary and a secondary winding, and a regeneration coil, said fixed condenser connecting one end of the contact coil to the low potential side of the primary winding of the tuning coil, the other end of the contact coil being connected directly to the high potential side of the primary winding, and said contact coil being exposed to provide a surface for the hand of the listener to hold the radio receiving device and as a result of this contact utilizing the electrostatic capacity of the human body to balance the inductance of said regeneration coil.

JOSEPH STUSSER. 

